Unhackable Temporal Reward for Scalable Video MLLMs - Yu, En; Lin, Kangheng; Zhao, Liang; Wei, Yana; Zhu, Zining; Wei, Haoran; Sun, Jianjian; Ge, Zheng; Zhang, Xiangyu; Wang, Jingyu; Tao, Wenbing (International Conference on Learning Representations, 2025)